- Sep 1 (Bryan) "Grant-Lee" Phillips, American singer-songwriter (Grant Lee Buffalo; The Gilmore Girls), born in Stockton, California
- Sep 1 Carola Smit, Dutch singer (BZN - "Bad Bad Woman")
- Sep 1 Stephen Kernahan, Australian rules footballer
- Sep 2 Sam Mitchell, NBA forward (Minn Timberwolves)
- Sep 3 Guido Imbens, Dutch American economist (2021 Nobel Prize for Economics), born in Geldrop, Netherlands
- Sep 4 John Vanbiesbrouck, American NHL goalie (Team USA, Florida), born in Detroit, Michigan
- Sep 4 Sam Yaffa, Finnish musician (Hanoi Rocks, New York Dolls), born in Espoo, Finland
- Sep 5 Jeff Brantley, American MLB pitcher and broadcaster (Cincinnati Reds), born in Florence, Alabama
- Sep 5 Kristian Alfonso, American actress (Days of Lives, Falcon Crest), born in Brockton, Massachusetts
- Sep 5 Tim McKyer, American NFL defensive back (Denver Broncos-Super Bowl 32), born in Orlando, Florida
- Sep 6 Alice Sebold, American novelist (The Almost Moon), born in Madison, Wisconsin
- Sep 6 Bryan Simonaire, American politician (Maryland State Senator), born in Baltimore, Maryland
- Sep 6 Geert Wilders, Dutch politician (Party for Freedom leader), born in Venlo, Netherlands
- Sep 6 József Kiprich, Hungarian soccer player (Feyenoord), born in Tatabánya, Hungary
- Sep 6 Mark Chesnutt, American country singer (Too Cold at Home), born in Beaumont, Texas
- Sep 6 Pat Nevin, Scottish soccer winger (28 caps; Chelsea, Everton, Tranmere Rovers), born in Glasgow, Scotland
- Sep 7 Chris Coons, American politician (Senator-D-Delaware 2010-), born in Greenwich, Connecticut
- Sep 7 W. Earl Brown, American actor, writer, and musician (Deadwood; Scream; Operation Petticoat - "Stovall"), born in Golden Pond, Kentucky
- Sep 8 Brad Silberling, American television and film director (Casper 1995), born in Washington, D.C.
- Sep 8 Gerald Williams, American NFL defensive end (Carolina Panthers), born in Waycross, Georgia
- Sep 8 Hitoshi Matsumoto, Japanese comedian (Downtown), born in Amagasaki, Japan
- Sep 8 Li Ning, Chinese gymnast (3 Olympic gold 1984), born in Laibin, Guangxi
- Sep 9 Leslie Thompson, American cross country skier (Olympics 1994), born in Burlington, Vermont
- Sep 10 Bill Stevenson, American music producer and drummer (The Descendants), born in Torrance, California
- Sep 10 Randy Johnson, American Baseball HOF pitcher (10 × MLB All-Star; 5 × Cy Young Award; World Series MVP 2001; Triple Crown 2002; Seattle Mariners, Arizona Diamondbacks), born in Walnut Creek, California
- Sep 10 Susan Gautier-Smith, British TV producer (d. 1996)
- Sep 11 Bonnie Gadusek, tennis player (French Juniors 1981), born in Pittsburgh, Pennsylvania
- Sep 11 Colin Wells, English actor (Johnno Dean-Hollyoaks), born in Greenwich, London
- Sep 11 Gerald Wilkins, American NBA guard (Orlando Magic), born in Atlanta, Georgia
- Sep 13 Theodoros Roussopoulos, Greek politician (Minister of State), born in Messinia, Greece
- Sep 14 Jaromir Dragan, Slovak ice hockey goalie (1992 Winter Olympics Bronze), born in Liptovský Mikuláš, Slovakia
- Sep 16 Garth Jax, American NFL middle linebacker (Arizona Cardinals), born in Houston, Texas
- Sep 16 Richard Marx, American rock musician ("Hold on to the Night"), born in Chicago, Illinois
- Sep 17 Amy Roloff, American reality star (Little People, Big World), born in Michigan
- Sep 17 James Urbaniak, American character actor, born in Bayonne, New Jersey
- Sep 17 Masahiro Chono, Japanese-American wrestler (NJPW), born in Seattle, Washington
- Sep 17 Michael Adler, American businessman and diplomat
- Sep 17 Rami Saari, Israeli poet and translator, born in Petah Tikva, Israel
- Sep 17 Steven Dye, English singer-songwriter and bassist (Scarlet Party - 101-Dam-Nations), born in Barking, Essex, England
- Sep 17 Warren Gatland, New Zealand rugby player and coach (Wales, British and Irish Lions), born in Hamilton, New Zealand
- Sep 17 Wendy Northcutt, American author of the Darwin Awards
- Sep 18 Jim Pocklington, British racing driver, born in Romford, London
- Sep 18 John Powell, British film score composer, based in America (Happy Feet; Bourne films), born in London
- Sep 18 Richard Weiss, American slalom single kayaker (Olympic 6th 1996), born in Munich, Germany (d. 1997)
- Sep 19 Alessandra Martines, Italian-French dancer and actress (Chance or Coincidence), born in Rome, Italy
- Sep 19 David Seaman, English football goalkeeper (Arsenal), born in Rotherham, England
- Sep 19 Jarvis Cocker, British pop singer-songwriter (Pulp - "Common People"), and radio personality, born in Sheffield, England
- Sep 21 Angus Macfadyen, Scottish actor
- Sep 21 Cecil Fielder, American baseball infielder (3 x MLB All Star, 2 x AL HR leader, Detroit Tigers; World Series 1996 Atlanta Braves), born in Los Angeles, California
- Sep 21 Curtly Ambrose, Antiguan cricket fast bowler (West Indies 98 Tests, 405 wickets @ 20.99; 176 ODIs), born in Swetes, Antigua and Barbuda
- Sep 23 Gabriele Reinsch, German DR, discus thrower (world record 1988)
- Sep 25 Keely Shaye Smith, American journalist (Unsolved Mysteries), born in Vallejo, California
- Sep 26 Douglas Wakiihuri, Kenyan athlete (World marathon champion 1987, Olympic silver 1988), born in Mombasa, Kenya
- Sep 26 Lysette Anthony, English actress (Angelique-Dark Shadows, Switch), born in London, England
- Sep 27 Caren Metschuck, German DR, 100m butterfly swimmer (Olympic gold 1980)
- Sep 28 Johnny Dawkins, American basketball guard (NBA: San Antonio Spurs, Philadelphia 76ers; Detroit Pistons) and coach (Stanford, UCF), born in Washington, D.C.
- Sep 28 Steve Blackman, American professional wrestler
- Sep 29 Les Claypool, American funk-metal bassist and singer-songwriter (Primus; The Claypool Lennon Delirium), born in Richmond, California
- Sep 30 Cristina Marsillach, Spanish actress (Barocco), born in Madrid, Spain
- Sep 30 Ed Drakich, Canadian volleyball player (Olympics 1996), born in Windsor, Ontario
About September 1963
How Old? 59 years old
Generation: Baby Boomer
Leap Year: No